| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [adj] [verb] that [noun] | 362 |
|
| 2 | [is] difficult [verb] [conj] [noun] | 35 |
|
| 3 | [be] difficult [verb] that [noun] | 22 |
|
| 4 | [is] difficult [verb] that [noun] | 17 |
|
| 5 | [is] difficult [verb] [that] [noun] | 17 |
|
